Unjoining chart lines

You can join (or importing descendant or ancestral trees can join automatically) the ends of
straight lines to any other chart element.

To unjoin both ends of all the currently selected lines and lines joined to the currently selected elements, use the Unjoin function.
The lines and elements will not move when you do this but the next time you move an element which was previously joined to a line, the
line will remain where it is.

It is also possible to unjoin an individual line end by using the same method as manually joining a line end.
Select the line you want to unjoin. Then hold down the CTRL key and drag with the left mouse button over the handle on
the line end, dropping it over a blank space in the Drawing Area. The mouse cursor will change to
and the handle will become green when you are doing this.

When you select an element which has a line joined to it, the joined line is shown with round, grey handles like this:

When you select a line which is joined to another chart element, the joined line is shown with round handles like this:

The Unjoin function is only enabled when one of the selected elements is an element with a joined line or is a line joined
to another element.